Hi
I would say that they are quite different. The QMC is different or I should say redesigned. Security and governance is handled differently and of course the license model is different, no server licenses only user tokens. This means that you can install multiple servers and you only need to buy licenses for your users (tokens). Documents are published to Streams and not to individuals, users are then given access to streams with published documents. Development of applications is done on the server. Another thing with the QMC or server is that you can create your own security rules allowing you to control and assign a broad variety of security rules to your users. These are just a few things, these and many more will be described in the documents that Gysbert suggested.
